高寒草甸珠芽蓼抗氧化物质含量的季节变化及与太阳辐射的关系

Seasonal variation in antioxidants of Polygonum viviparum and its relation to solar radiartion in alpine meadow

对高寒草甸珠芽蓼中几种抗氧化物质含量的季节变化测定发现 ,珠芽蓼叶片内抗坏血酸、超氧阴离子自由基的相对含量、超氧化物歧化酶的活性以及紫外辐射吸收色素在 5月至 8月间呈现“拱型”曲线变化 ,不同物质分别以 6、7月份最高 ,分别与海北站地区的太阳辐射呈现一定的相关性。

Study on the seasonal variation in contents of antioxidants of Polygonum viviparum and its relation to solar radiation indicated that the contents ascorbic acid,superoxide radical (O -· 2) and of ultraviolet absorbing compounds,and the activity of superoxidase (SOD) exhibited convex course from May to August.Seasonal changes in antioxidants of Polygonum viviparum were related to solar radiation.